v(t) = \int {a(t)\,\operatorname{d} t;\quad s(t) = \int {v(t)\,\operatorname{d} t = \iint {a(t)\,\operatorname{d} t\,\operatorname{d} t.}} } | v(t) = \int {a(t)\,\operatorname{d} t;\quad s(t) = \int {v(t)\,\operatorname{d} t = \iint {a(t)\,\operatorname{d} t\,\operatorname{d} t.}} } |